Lathe



July 15, 1924.

INGHAM ET AL.

LATHE Filed Nov. 5, 1921 3 Sheets-Sheet l July 15, 1924. 1,501,346

W. E. INGHAM ET AL LATHE Filed Nov. 5 1921 3 Sheets-Sheet 2 fggz/ntzz WI m Mme/14.

July 15, 1924- w. E. INGHAM AL LATHE 192i a Sheets-Sheet 5 Filed Nov. 5

Patented July 15, 1924.

UNITED STATES PATENT OFFICE.

WALTER E. INGHAM, OF NEWINGTON, A ND ALEXANDER WEITEHEAD, OF HART- FORD,CONNECTICUT, ASSIGNORS TO PRATT & WHITNEY COMPANY, OF NEW YORK,

N. Y., A CORPORATION OF NEW JERSEY.

LATHE.

Application filed November 5, 1921. Serial No. 513,139.

ton and Hartford, res ectively, in the county of Hartford and tate ofConnecticut, have invented certain new and useful Improvements inLathes, of which the following is a specification.

This invention relates to lathes and particularly to the spindle drivingmechanism therefor. The primary object of the invention is to provide animproved arrangement of spindle driving mechanism com-- prising changespeed gearing, such mech' anism being so constructed and arranged as torender the machine more com act and stable and to improve the generaappear-.

ance and operation thereof.

In lathes and other machines comprising a rotary spindle,the drivingmeans for such spindle, including the back gears, has usu-. ally beenlocated laterally. of the spindle or in such a relatively spacedposition .as to render the machine unsightly and ofterunstable. Theentire mechanism for driving the spindle in the present invention is socompactly arranged beneath the spindle as to improve the stability,operation and general appearance of the machine. It is accordingly anobject of the invention to pro vide a change speed spindle drivingmechanism and spindle driving back gears, both located beneath thespindle, and to drive such mechanism preferably from a motor in the baseof the machine, the arrangement being such as togenerally improve theoperation of the mechanism and to provide a symmetrical and wellbalanced machine.

Another object of the invention is to provide amachine of the typestated wherein the spindle and change gears and driving gears thereforare mounted in a headstock on the bed of the machine and extenddownwardly therein, such gears being adapted A further object of theinvention .is to provlde an oil reservoir within the bed of the machinedirectly beneath the headstock, such reservoir also preferablycomprising a casing secured to the exterior of the bed and housing adriving unit for the spindle driving gears, the oil in the reservoirbeing adapted to properly lubricate the spindle andlts operatingmechanism and toreceive the drainage oil from such mechanism. With theseand other objects in view our 1nvent1on consists in the features ofconstructlon and operation set forth in the following specification andillustrated in the accompanying drawings. In such drawings annexedhereto and forming a part of this specificatlon, we have shown certainembodiments of our invention but it will be understood that theinvention can be otherwise embodied and that the drawings are not to beconstrued as defining or limiting the scope of the invention, the claimsappended to this specification being relied upon for that purpose.

Referring to the .figuresof the drawings:

, Figure 1 is a partial front elevation of a lathe comprising. thepresent invention.

Fig. 2 is an end view thereof.

Fig. 3 is an elevation of the headstock, a portion thereof being shownin longitudinal vertical 'section. a

Fig. 4 is a front end elevation of the headstock.

Fig. 5 is a vertical cross sectional view of the machine taken on line55 of Fig. 3.

Fig. 6 is a fragmentary sectional view taken on line 66 of Fig. 5.

Fig. 7 is a fragmentary cross sectional view taken on line 7-7 of Fig.3.

Fig.8 is a fragmentary cross sectional view taken on line 88 of Fig. 3.-

Referring more specifically to the drawings by reference characters, 1indicates the bed of a lathe supported on a base or pedestal 2. '-Aheadstock 3 and a tailstock 4 are mounted on the bed and a tool carriage5 is slidably mounted on the ways of the bed. The tool carriage 5 may beoperated from a screw 6 or from a feed shaft 7, the latter also beingadapted to operate a tool slide 8. The improved feed mechanism foroperating the screw and feed shaft is fully disclosed in a copendingapplication to W. E. Ingham,

Serial No. 513,167 filed on even date herewit A rotary spindle 9 ismounted in the headstock 3. As lllustrated in the drawings, the drivingmechanism for the spindle, including change speed gearin t erefor, isarranged beneath the spin e. A portion of the driving means for thechange speed gearing is located to the rear of the machine directlyopposite the feed mechanism located keyed to a tubular shaft or s eeve19 loose on a fixed shaft 20. The shaft 19 is adapted to be driven froma wide gear 21 meshing with gear 15. The gear 21 is mounted in a bracket21 secured to the bottom of the headstock by means of bolts 21". Byshifting the gears 15 to 18., as hereinafter explained, the sleeve 10may be dr1ven.at any one of four different speeds.

' The drive of the spindle is either directly from the sleeve 10 througha two-part cushion gear 22 ke ed to the spindle or indirectly therefromt rough the back gears 23 and 24 located beneath. the spindle, suchdrive always being through the cushion gear 22. The gear 22 comprisestwo parts 22 and 22" secured together by studs 22, flexible washers 22being interposed to serve as a cushioning or shock absorbing means. Thegear 14 is provided with an internally toothed gear 25 seated rigidly inone face thereof. A gear 26 is loosely and slidably mounted on thespindle between the gears 22 and 25, such gear being always in mesh withgear 25 and being adapted to be engaged with an internally toothedportion 27 of gear 22. The gear 26 is adapted to be shifted axially onthe spindle by a handle 28 operatively connected to a yoke 29 engagedwithin an annular groove in a ring 30, a spring detent 29 being adaptedto hold the yoke in its shifted position. The ring is connected to thegear 26 through a pair of pins 31 extend ing through the gears 14 and 25and having heads thereon engaging the gear 26.

The back gears 23 and 24 are keyed together and are mounted for rotationon a shaft 32 eccentrically mounted in rotary bearings 33 and 34 at itsends, the said bearings and shaft 20 being coaxial. By referring to Fig.7 it will be seen that one end be rotated to throw the back gears 1ntoor out of operation. A latch 36 onthe handle is adapted'to hold thehandle and back gears in the operative position with gears 26 and 23 andgears 22 and 24 in mesh as illustrated in Fig. 3. The gears 15 and 16are splined for longitudinal movement on the'tubular shaft 19 and gears17 and 18 may be shifted longitudinally with such shaft 19 on the shaft20. Shifting handles 37 and 38 are provided with arms 39 and 40 engagingears 15 and 17 whereby such gears may be 5 ifted to engage any one ofgears 15 to 18 respectively with gears 11 to 14 of the spindle. Inoperation, the sleeve 10 may be driven at any one of four speeds throu hgearing 11 to 18, as has been described. f it is desired to drive thespindle direct at such speed, the gear 26 is shifted forwardly intoengagement with gear teeth 27 of gear 22, the back gears 23 and 24 atsuch time being dropped from engagement with gears 26 and 22. If it isdesired to operate the spindle at a reduced speed through the backgears, the gear 26 is drawn back wardly from engagement with gear 22 andthe back gears are brought upwardly-into mesh with gears 26 and 22, suchdriving position of the gearing being illustrated in Fi 3 wherein thedrive to the spindle is throng gears 26, 23, 24 and 22.

It will be noted that the headstock with the spindle and its cooperatingmechanism, as thus far described, is removable from the bed 1 asa unit.The headstock may be secured to the bed by a clamping means 3. Thespindle is adapted to be driven by driving gearing extending upwardly inthe bed into driving engagement with the spindle gearing. Such mechanismis hereinafter more specifically described.

The gear 21, heretofore defined as driving the change speed gearing, isdriven from a power shaft 41 through a friction clutch 42, gear 43 on asleeve 44, and meshing with a gear 45 in mesh with gear 21. The shaft 41is provided with a belt pulley 46 so located to the rear of the machinethat the same maybe driven either from a motor in the base of themachine or from an overhead countershaft. In the drawings we haveillustrated this shaft 41 as driven by a belt 47 from a pulley 48 on amotor 49. The motor 49 is housed within the base 2 substantiallyvertically beneath the spindle The friction clutch 42, illustrated in Fig. 6, is of the type known as the Johnson clutch. The inner drivingportion of the clutch is mounted on the power shaft 41.

Such clutch portion is adapted to be expanded by means of a plurality ofpins 52 mounted on an annular member 53 and ada ted to engage'expandinglevers '54. A bra e element 55 is keyed to the sleeve 44. Collars 56 and57 on a longitudinally slidable rod .58 engagethe clutch member 53 andbrake '55 respectively. A handle 59 at the front of the machine isoperatively connected to the rod 58 through a connecting rod 60 engaginga lever 61 on one end of a rock shaft 62, a lever 63 on the opposite endof such shaft engaging the rod 58. Movement of the rod 58 in onedirection is adapted to release the brake and engage the clutch andmovement thereof in the opposite direction is adapted to disengage theclutch and ap ly the brake.

s shown particularly in Figs. 3 and 5, we provide an oil reservoir 64 inthe bed of the machine directly beneath the headstock. The spindle andits operating mechanism may be lubricated from this reservoir in anymanner desired. It will be noted that the spindle driving gearingextends downwardly" into this reservoir and such gearin and spindle arereferably lubricated rom the splash of tlie gears therein,

the oil being carried upwardly by the rotating gears to the spindle andits several operating elements. The reservoir is also adapted to receivethe oil dripping from the spindle and gearing. The bed and headstock areprovided with overhanging flanges 65 and 66 thereon whereby to preventdripping of the lubricant exteriorly of the reservoir.

By reference to Fig. 5, it will be noted that the side of the bed 1 isprovided with an opening 1 through which projects the gear 45. Thedriving means comprising shaft 41, gear 45 and the mechanism cooperatingtherewith is supported in a casing 67 secured to the exterior of the bedabout the said opening 1 by means of bolts 68. As has been heretoforedescribed, the heads'troke and its cooperating mechanism including thedriving gear 21, are removable from the bed as a unit. It will be notedalso that the driving means, including the shaft 41 and gear 45, is alsoremovable from the bed as a'unit merely by removing bolts 68. Suchconstruction renders the machine extremely compact and simple and easyto disassemble for inspection or other purposes when such action isdesired. It will furthermore be noted that when these two units, viz,the driving unit in casing 67 and the driven unit on the headstock, areproperly assembled on the bed, their respective gears 45 and 21intermesh as illustrated in Fig. 5. It will furthermore be noted thatthe casing 67 forms an extension of the oil reservoir 64, the oil beingada ted to flow freely through the opening 1. oth these driving unitsand the s indle are therefore at all times properly ubricated from thisreservoir.

By reference to Figs. 1 and, 2, it will be noted that the eneralconstruction and arrangement of t e several parts of the machine aresuch as to provide a lathe having the several advantages andimprovements heretofore outlined. The several controls, including theback gear shifting handle 35, spindle change speed earing handles 37 and38, and clutch shi ting handle 59 are directly in front of the operatorsposition at the lathe. The spindle driving gearing, illustrated" in Fig.3, is so compactly arranged as to provide a rigid construction closelyadj acentthe front end of the spindle. The back gearing is free from theusual long driving shaft, is arran ed within the headstock beneath thespin 1e and may be conveniently operated from the handle 35 placedbeneath the spindle at the front end of the headstock. Such arrangementof the entire spindle driving mechanism beneath the spindle leaves theheadstock free from any objectionable laterally projecting drivingmechanism. The arrangement of the power shaft 41 and the cooperatingdrivmg means for the change speed gears to the rear of the machine,directly opposite the feeding mechanism therefor at the front of themachine, provides a symmetrical and well balanced machine, asillustrated particularly in Fig. 2. Also the arrangement and location ofthe drivingpulley 46 readil adapts the machine to be operated as welfrom an overhead countershaft as from the motor 49 illustrated in thedrawings. It will furthermore be noted that since the change speedgearing is directly adjacent the spindle, the speed of the belt 47 isconstant, a change of Spindle-speed only ef- 1 5 footing the speed ofthe spindle and the gears thereon. Such arrangement avoids the tendencyof the belt to slip with aconsequent loss of power whichordinarilyattends a drive of this type wherein the belt operates atvariable speeds.

What we claim is:

1. In a machine of the class described, the combination of a rotaryspindle, av plurality of gears thereon, a shaft adjacent the spindle,125 gearing including certain of the spindle gears for operativelyconnecting the shaft with the spindle, a plurality of back gears adaptedto be engaged with other of the spindle gears,

the said gearing and back gears being 10- cated substantially in thevertical plane of the spindle, and'means 0 eratively connected with theshaft for driving the same.

2. In a machine of the class described, the combination of a rotaryspindle, a plurality of gears thereon, a shaft adjacent the spindle,gearing operatively connecting the shaft with certain of the spindlegears, a plurality of back gears beneath the spindle adapted to beengaged with other of the spindle gears, the said gearing and back gearsbeing located beneath the spindle, and means operatively connected withthe shaft for driving the same.

3. In a machine of the class described, the combination of a rotaryspindle, a plurality of gears thereon, a shaft extending along oneportion of the spindle, earingoperatively connecting the shaft withcertain of the spindle gears, a back gear shaft extending along anotherportion. of the spindle, back gearing on the back gear shaft adapted tobe engaged with other of the spindle gears, the said two shafts beinglocated beneath the spindle, and means operatively connected with thefirst named shaft for driving the same. a y 4. In a machine of the classdescribed, the combinationof a rotary spindle, a plurality of gearsthereon, a shaft parallel with and adjacent the spindle, gearingoperatively connected to certain of the spindle gears, and includingchange speed mechanism, for operatively connecting the shaft with thespindle,

" back gears for the spindle, means for engaging an'd disengaging theback gears from certain of the spindle gears, the said gearing and backgears being located beneath the spindle, and means operatively connectedwith the shaft for driving the same.

5. In a machine of the class described, the combination of a rotaryspindle, a plurality of gears thereon, a shaft extending alon oneportion of the spindle, gearing operatively connecting the shaft wlthcertain of the spindle gears, a back gear shaft extending along anotherportion of the spindle, a plu rality of bearings coaxial of the firstshaft and supporting the back gear shaft, back gearing on the'back gearshaft adapted to be engaged with other of the spindle gears, the saidtwo shafts being located beneath the spindle, and means operativelyconnected with the first named shaft for driving the same. a a

6. In a machine of the class described, the combination of a headstock,a rotary spindle mounted therein, a plurality of gears mounted onthespindle, a shaft extending along one portion of the spindle, gearingoperatively connecting the shaft with certain of the spindle gears, aback gear shaft extending along another portion of the spindle, theheadstock having a plurality ofcirohlar openings therein coaxial of'thefirst shaft, a

bearing block rotatably mounted in each of such openings and supportingthe back gear shaft eccentrically therein, back gearing on the backgearshaft, means for rotating the bearing blocks to engage the backgears with other of the spindle gears, and means operatively connectedwith the first named shaft for driving the same.

7. In a machine of the class described, the combination of a bed,a'headstock thereon, a rotar spindle mounted in the headstock, a set 0gears on the spindle, a shaft in the headstock beneath and parallel withthe spindle, a set of gears on the shaft adapted to cooperate with thespindle gears, certain of the gears of one set being relatively slidablelongitudinally to selectively engage the gears thereof with thecorresponding gears of the other set, and power operated means beneaththe spindle and shaft for driving the shaft.

8. In a machine of theaclass described, the combination of a bed, aheadstock thereon, a rotary spindle mounted in the headstock, a set ofgears on the spindle, a shaft in the headstock beneath and parallel withthe spindle, a set of gears on the shaft adapted to cooperate with thespindle gears, certain of the gears of one set being relatively slidablelongitudinally to selectively engage the gears thereof with thecorresponding gears of the other set, spindle driving back gears beneaththe spindle, and means operat-ively connected with the shaft for drivingthe same.

9. In a lathe, the combination of a spindle, a driving gear loosethereon, a gear fixed to the spindle, means for sliding the loose gearinto and out of driving engagement with the fixed gear, two back gearsbeneath the spindle, means for raising and lowering the back gears intoand out of mesh with the loose and fixed gears, and means for drivingthe said loose gear.

10. In a lathe, the combination of a spindle, a driving gear loosethereon, a gear fixed to the spindle, the fixed gear having aninternally toothed portion corresponding in contour to the driving teethof the loose gear 7 and adapted to be engaged and driven thereby, meansfor sliding the loose gear axially on the spindle into and out ofdriving engagement with the said toothed portion of the fixed gear, twoback gears beneath the spindle, means for raising and lowering the backgears into and out of mesh with the loose and fixed gears, and means fordriving the said loose gear. a

11. In a lathe, the combination of a spindle, a driving gear loosethereon, a gear fixed to the spindle, means for optionally operativelyconnecting the two gears, two back gears supported on a shafteccentrically mounted in bearings at its ends beneath the spindle, ahandle secured to the front end of the shaft beneath the spindle andadapted to rotate the shaft and hearings to raise the back gears intomesh with the said spindle gears, and means for holding the shaft andgears in the raised position.

12. In a lathe, the combination of a spindle, a driving gear loosethereon, a gear fixed to the spindle, means for optionally operativelyconnecting the two gears, two back gears beneath the spindle, means forraising and lowering the back gears into and out of mesh with loose andfixed gears, and means including change speed gearing beneath thespindle for driving the said loose gear.

13. In a machine of the class described, the combination of a headstock,a rotary spindle mounted therein, spindle driving gearing, includingchange speed gearing, beneath and adjacent the spindle, a power shaft tothe rear of and operatively connected to the said gearing, and a drivingpulley on the power shaft, the location of the pulley being such thatthe same may be belt-driven either from a motor in the base of themachine or from an overhead countershaft.

14. In a machine of the class described, the combination of a headstock,arotary spindle mounted therein,- a shaft parallel with, adjacent andbeneath the spindle, change speed gearing between the shaft and spindle,a power shaft below and to the rear of the spindle, an operativeconnection between the power shaft and gearing, and a driving pulley onthe power shaft, the location of the pulley being such that the same maybe belt-driven either from a motor in the base of the machine or from anoverhead countershaft.

15. In a machine of the class described, the combination of a rotaryspindle, a shaft arallel with and adjacent the spindle, gearmg includingchange speed mechanism beneath the spindle for operatively connectingthe shaft with the spindle, a power shaft to the rear of the first namedshaft, means comprising a friction clutch for operatively connecting thetwo shafts, and a hand lever at the front of the machine for operatingthe clutch.

16. In a lathe, the combination of a bed, a headstock mounted thereon, as indle rotatably mounted in the headstoc gearing, including changespeed gearing, supported in the headstock beneath the spindle,operatively connected to the spindle and extending downwardly into thebed, a power shaft to the rear of the bed, an operative connectionbetween the ower shaft and gearing, and a driving pu ley on the powershaft, the location of the pulley being'such that the same may bebelt-driven either from a motor in the base of the machine or from anoverhead countershaft.

ing

17. In a machine of the class described, the combination of a base, abed supported thereon, a headstock on the bed, a rotary spmdle mountedin the headstock, a motor mounted in the base, change speed gearingbeneath and adjacent the spindle for driving the same, and a flexibledriving connection between the motor and the change speed gearing.

18. In a machine of the class described, the combination of a base, abed supported thereon, a headstock on the bed, a rotary spindle mountedin the headstock, a motor mounted in the base, change speed spindledriving mechanism beneath and adjacent the spindle and comprising ashaft parallel with the spindle, an operative connection comprising aplurality of gears on the shaft adapted to mesh with certain gears onthe spindle, and an operative driving connection between the motor andthe change speed gearing.

19. In a machine of the class described, the combination of a base, abed supported thereon, a headstock on the bed, a rotary spindle mountedin the' headstock, a motor mounted in the base substantially in thevertical plane of the spindle, spindle driving change speed gearingbeneath the spindle, and a belt driving connection between the motor andthe change speed gearing.

20. In a machine of the class described, the combination of a base, abed supported thereon, a headstock on the bed, a rotary spindle mountedin the headstock, a shaft parallel with and adjacent the spindle,gearincluding change speed mechanism beneath the spindle for o erativelyconnecting the shaft with the spindle, a shaft to the rear of the firstnamed shaft, means comprising a friction clutch for operativelyconnecting the two shafts, a motor 1n the base, and a belt drivingconnection between the motor and the second named shaft.

21. In a lathe, the combination of a bed, a headstock mounted thereon, aspindlerotatably mounted in the headstock, gearing, including changespeed gearlng, supported in the headstock beneath the spindle,operatively connected to the spindle and extend-- ing downwardly intothe bed, and drive gearing in the bed engaging the said gearingextending into the bed, the headstock and its gearing being removablefrom the bed as a unit.

22. In a lathe, the combination of a bed, a headstock mounted thereon, aspindlerotatably mounted in the headstock, gearing, including changespeed gearing, supported in the headstock beneath the spindle,operatively connected to the spindle and extending downwardly into thebed, and a driving gear in the bed engaging the said gearing extendinginto the bed, the rotary axis of the said gearing being parallel to thespindle axis and the headstock and its gearingbeing removable from thebed as a unit.

23. In a lathe, the combination of a bed, a headstock mounted thereon, aspindle rotatably mounted in the headstock, a set of gears on thespindle, a shaft in the headstock beneath and parallel with the spindle,a set of gears on the shaft adapted to cooperate with the spindle gears,certain of the gears of one set being relatively slidable longitudinallyto selectively engage the gears thereof with the corresponding gears ofthe other set, and means in the bed operatively connected to the shaftfor drivin the same, the headstock and the shaft witi the gears thereonbeing removable from the bed as a unit.

24. In a lathe, the combination of a bed, a headstock mounted thereon, aspindle rotatably mounted in the headstock, a set of gears on thespindle, a shaft'in the headstock beneath and parallel with the spindle,a set of gears on the shaft adapted to cooperate with the spindle gears,certain of the gears of one set being relatively slidable longitudinallyto selectively engage the gears thereof with the corresponding gears ofthe other set, a ear supported in the headstock beneath the shaft,operatively connected to the shaft and extending downwardly intothe'bed, and other gearing in the bed operatively connected to the saidgear for driving the same, the headstock, change gears and the said gearsupported in the headstock'being removable from the bed as a unit.

25. In a lathe, the combination of a base, a bed supported thereon, aremovable headstock mounted on the bed, a spindle rotatably mounted inthe headstock, gearing operatively connected to the spindle andextending downwardly into the bed, the bed having an opening through theside thereof, and driving means extending through the said opening andengaging the said gearing for driving the spindle.

26. In a lathe, the combination of a base, a bed supported thereon, aremovable headstock mounted on the bed, a spindle r0- tatabl mounted inthe headstock, gearing inclu in change speed gearing operativelyconnecte to the spindle and extending downwardly into the bed, the bedhaving an opening through the side thereof, and driving means extendingthrough the said opening and engaging the said gearing for driving thespindle.

27. In a lathe, the combination of a base, a bed supported thereon, aremovable headstock mounted on the bed, a spindle rotatablv mounted inthe headstock, gearing including change speed gearing operativelyconnected to the spindle and extending ownwardl into the bed, the'bedhaving an opening through the side thereof, and gearing extendingthrough the said opening and engaging the first said gearing for drivingthe spindle.

28. In a lathe, the combination of a base, a bed supported thereon, aremovable headstock mounted on the bed, a spindle rotatably mountedin-the headstock, gearing including change speed gearing operativelyconnected to the spindle and extending downwardly into the bed. the bedhaving an opening through the side thereof, gearing extending throughthe said opening and engaging the first said gearing for driving thespindle, and driving means for the second mentioned gearing supported ona bracket secured to the exterior of the bed adjacent the said opening.

29. In a lathe, the combination of a bed, a headstock mounted thereon, aspindle rotatably mounted in the headstock, gearing, including changespeed gearing, supported in the headstock beneath the spindle,operatively connected to the spindle and extending downwardly into thebed, the bed having an opening through the side thereof, and drivingmeans extending through the said opening and engaging the said gearingfor driving the spindle, the headstock and gearing being removable fromthe bed as a unit independently of the said driving means.

30. In a lathe, the combination of a bed, a headstock mounted thereon, aspindle rotatably mounted in the headstock, gearing, including changespeed gearing, supported in the headstock beneath the spindle,operatively connected to the spindle and extending downwardly into thebed, the bed havingan opening through the side thereof, and gearingextending through the said opening and engaging the first said gearingfor driving the spindle, the headstock and gearing being removable fromthe bed as a unit independently of the second mentioned gearing.

31. In a lathe, the combination of a bed, a headstock mounted thereon, aspindle rotatably mounted in the headstock, gearing, including changespeed gearing, supported in the headstock beneath the spindle,operatively connected to the spindle and extending downwardly into thebed, the bed having an opening through the side thereof, gearingextending through the said opening and engaging the first said gearingfor driving the spindle, and driving means for the second mentionedgearing supported on a bracket secured to the exterior of the bedadjacent the said opening, the headstock and gearing being removablefrom the bed as a unit and the said bracket with its driving means andgearing being removable from the side of the bed as a unit.

32. In a machine of the class described, the combination of a bed, anoil reservoir formed therein, a headstock mounted thereon, a spindlerotatably mounted in the headstock, gearing supported in the headstockbeneath the spindle, operatively connected to the spindle and extendingdownwardly into the reservoir, the oil in the reservoir being adapted tolubricate the gearing and spindle, and means for driving the gearing.

'33. In a machine of the class described,

voir, the oil in the reservoir being adapted to lubricate the gearingand spindle, and means engaging the gearing in the reservoir for drivingthe spindle.

34. In a machine of the class described, the combination of a bed, anoil reservoir formed therein, a headstock mounted thereon, a spindlerotatably mounted in the headstock, gearing, including change speedgearing, supported in the headstock beneath the spindle, operativelyconnected to the spindle and extending downwardly into the reservoir,the oil in the reservoir being adapted to lubricate the gearing andspindle and the reservoir being adapted to catch the oil draining fromthe said gearing and spindle, flanges on'the bed and headstock forpreventing the dripping of oil outside the reservoir, and means fordriving the gearing.

35. In a machine of the class described, the combination of a bed, anoil reservoir formed therein, a headstock mounted thereon, a spindlerotatably mounted in the headstock, gearing operati'vely connected tothe spindle and extending downwardly into the reservoir, the bed havingan opening through the side thereof into the reservoir, a casingsupported on the exterior of the bed about the said opening, and adriving unit within the casingl operatively connected to the-saidgearing t rough the opening, the reservoir the gearing and spindle andthe oil in the reservoir being adapted tolubricate the gearing, spindleand driving unit. g

In testimony whereof, we hereto naflix our signatures.

WALTER E. INGHAM. I ALEXANDER e. WHITEHEAD.

, eing adapted to catch the oil draining from

